Re: Callback in Ada

[Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>]

On 11/27/2010 04:32 AM, Georg Bauhaus wrote:
>
> 2. Function pointers
>
> type To_Be_Applied is access function ( ... );
> (Or the Ada 2005 anonymous variant if you really need to
> avoid names.)

While anonymous access types in current Ada seem designed to allow the developer 
to avoid creating type names and to adopt a C-like coding style, in the case of 
access-to-subprogram, the anonymous form has an advantage over named types: they 
allow passing access to a local subprogram ("downward funargs") without any of 
the accessibility checks or worries that accompany named types. I can't say I'm 
a fan of the syntax, but that's a useful capability.

-- 
Jeff Carter
"There's no messiah here. There's a mess all right, but no messiah."
Monty Python's Life of Brian
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